Great points made by Dan, the only thing I would add is if interested in puchasing Pandas, look for certified & encapsulated examples from one of the 4 major grading companies: PCGS - NGC - ANACS & ICG this will also identify any sub-types of the series {I.E- Large or Small Dates}.
As a long time current Seller on E-Bay and now a new seller on E-Bid, I too hope that additional exposure and new E-Bid buyers can eventually gain ground on other "Fee Based" sites. Unfortunately high fees and softer precious metals markets have just killed any profit margins for sellers.
I look forward to expanding my business over here although I would like to see some structure, format and search improvements made to the E-Bid site {Like searching for like items WITH bids & some separation of true auctions vs Buy it Now/Best Offer}
Best Regards & Happy Collecting - Jim / Stlcoin